The CY74FCT2245T contains eight noninverting, bidirectional buffers with 3-state outputs intended for bus-oriented applications. On-chip termination resistors at the outputs reduce system noise caused by reflections. For this reason, the CY74FCT2245T can replace the CY74FCT245T in an existing design. The CY74FCT2245T current-sinking capability is 12 mA at the A and B ports.
The transmit/receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active high) enables data from A ports to B ports; receive (active low) enables data from B ports to A ports. The output-enable (OE) input, when high, disables both the A and B ports by putting them in the high-impedance state.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
| Supply voltage (min) (V) | 4.75 |
| Supply voltage (max) (V) | 5.25 |
| Number of channels | 8 |
| IOL (max) (mA) | 12 |
| IOH (max) (mA) | -15 |
| Input type | TTL |
| Output type | TTL |
| Features | Damping resistors, Partial power down (Ioff), Very high speed (tpd 5-10ns) |
| Technology family | FCT |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 85 |
| PDIP (N) | 20 | 228.702 mm² 24.33 x 9.4 |
| SOIC (DW) | 20 | 131.84 mm² 12.8 x 10.3 |
| SSOP (DBQ) | 20 | 51.9 mm² 8.65 x 6 |
| TSSOP (PW) | 20 | 41.6 mm² 6.5 x 6.4 |
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